<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>删除文件</title>

 </head>
 <body><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.umask.html">umask</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="book.inotify.html">Inotify</a></div>
 <div class="up"><a href="ref.filesystem.html">Filesystem 函数</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="function.unlink" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">unlink</h1>
  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">unlink</span> &mdash; <span class="dc-title">删除文件</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.unlink-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">bool</span> <span class="methodname"><strong>unlink</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>
   [, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$context</code></span>
  ] )</div>

  <p class="para rdfs-comment">
   删除 <em><code class="parameter">filename</code></em>。和 Unix C 的
   unlink() 函数相似。
   发生错误时会产生一个 <strong><code>E_WARNING</code></strong> 级别的错误。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.unlink-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">filename</code></em></dt>

     <dd>

      <p class="para">
       文件的路径。
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">context</code></em></dt>

     <dd>

      <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">在 PHP 5.0.0
中增加了对上下文（Context）的支持。有关<em>上下文（Context）</em>的说明参见
<a href="book.stream.html" class="xref">Streams</a>。</span></p></blockquote>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.unlink-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.unlink-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>5.0.0</td>
       <td>
         自 PHP 5.0.0 起
    <span class="function"><strong>unlink()</strong></span> 也可以用于<em class="emphasis">某些</em>
    URL 封装协议。参考<a href="wrappers.html" class="xref">支持的协议和封装协议</a> 中的列表看哪些封装协议支持
    <span class="function"><strong>unlink()</strong></span>。
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.unlink-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2374">
    <p><strong>Example #1 基本的 <span class="function"><strong>unlink()</strong></span> 用法</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$fh&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #DD0000">'test.html'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'a'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fwrite</span><span style="color: #007700">(</span><span style="color: #0000BB">$fh</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'&lt;h1&gt;Hello&nbsp;world!&lt;/h1&gt;'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$fh</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">unlink</span><span style="color: #007700">(</span><span style="color: #DD0000">'test.html'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.unlink-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.rmdir.html" class="function" rel="rdfs-seeAlso">rmdir()</a> - 删除目录</span></li>
   </ul>
  </p>
 </div>

</div><hr /><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.umask.html">umask</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="book.inotify.html">Inotify</a></div>
 <div class="up"><a href="ref.filesystem.html">Filesystem 函数</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
